Casting-machine.



c. H. LISTER.

CASTING MACHINE.

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APPLICATION man luNE 2|. |915. l

Patented June 19, 1917.

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CASTING MACHINE.

APPLICATION FILED IuNEzI, 1915.

1,230,587. Pamtediune 19, 19u.

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C. H. USTER.

CASTING MACHINE.

APPLICATION FILED IuNE 21, I9I5.

1 ,230,58'7. Patented June 19, 19l7.

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c. H. usm. CASTING MACHINE.

APPLICATION'FILED JUNE2|| ISIS- Patented June 19, 1917.

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CHARLES HENRY LISTER, OFNORTH ST. PAUL, MINNESOTA;

Specication of Letters Patent.

PatentedJun'e 19, 19'1 7.

Application led J'iine 21, 1915.v Serial N o. 35,256.

To all whom t may concern.'

Be it known that I, CHARLES Hinrirr- Ins- TER, a citizen of the United States, residing at North St. Paul, in the -county of-Ram sey and State of Minnesota, have invented new and useful Improvements in Casting Machines, of which the following is a specification.

My invention relates to improvements in` casting 'machines It is an improvement upon the machine covered byv my numbered 1,033,254 and dated, July 23rd, 1912.

Its object is to provide al simple, durable for opening and closing the several ymold' sections and for yieldingly securing thefsame in closed positions.

My invention also includes various novel features of construction, which are hereinafter particularly described and pointed out .in the el aims.

In the drawings, Figure 1 is a side elevation of my improved casting machine; Fig. 2 is a plan view thereof; Fig.. 3 is an end elevation of the. same; Fig. 4 is an end elevation in detail of. a mold and illustrates thecarriage for said mold and'mechanism for shifting the movable mold sections; Fig. 5 is a plan View thereof; Fig. 6 is a side elevation of the same; Fig. 7 -is a side elevation in detail of the rack employed in opening the molds; onthe line 8-8 of Fig. 7; Fig. 9 is a side' elevation of the rack employed in yclosing the molds,vand Fig. 10 is an end elevation thereof.

Referring to the drawings, and particularly to Fig. 1, it will be seen that `my invention consists primarily-of a frame A, an endless double-rail trackB mounted on said frame, a series of carriages -C with sepan able molds D thereon, adapted to travel upon said track B, a cooling tank E onv the frame through which said carriages pass, an open-ingdevice Fv for said molds and a. closing device G therefor.V

patent Fig; 8 is a sectional viewtaken The frame A consists of channel irons and angle irons, suitablybraced tol formal rigid structure.` The water'tank E is supported near `one end of the frame'and a filling platform -11 is arranged at the other endl there-v of, Afor workmen Whose dutyit -is tol ll the passing molds D with molten metal. hopper 12vis also carried by the-frame A and is arranged between-the Vtank-E andfill-ing' platform 11 and beneath the upper run ofthe track B, said hopper beingivemployed to `convey'from the' machine the molded product discharged fromV said molt s.

The rails 13 of the trackB are formed of angle irons, the outer flanges thereof'iprojecting upwardly to retain the wheels l14 ofthe traveling carriages C upon the horizontal flanges of `said rails. This track' B' comprises an-upperand lower set of'rails which are bent at their ends, the-lower set over-reaching the upper set of rails, to turn the-mold carriages C and direct the same from one set of railsv tothe other.`

The upper run'offthetrackadips into the water tank E and acurved guide 15 is provided for each rail thereof to retain the wheels 14 of thel mold carriages C upon saicl ra.ils as they pass over the depressed portion of said track.

-The mold carriages C are identical, (see Figs. 4, 5 and G) each includinga pair-of side ba-rs 16 and 17, joined at their ends by shafts 18, having wheels 14 revolubly mounted upon the opposite ends thereof. The side Vbars 16-and 17 of the carriage Yare each 4supplied -with a lug 19 therefrom, said lugs being secured to separate endless chains 20 extendingaround the frame. Thesev chains pass over idler sprocket wheels 21 mounted upon a shaft 22 at 'one end of the frame and also over driving sprocket wheels 23 on'a shaft 24 at the other end of vthev frame, said shaft being connected by gear wheels 25 and'26 with. a power shaft 27 upon whicha power pulley 28 is secured.

An upright separable mold D is vfurdepending,

nished for each carriage and consists of a stationary mold member 29 and a movable mold member 30.` Said mold members 29 and 30 are formed respectively with bearings 31 and 32 at their sides whichreceive the shafts 18V of the carriage. The'mold member 29 is Xed upon said shafts 18 by set screws 33 threaded in the bearings 31 while the second mold member 30 is slidable upon said shafts.

Means tor shitting the mold member 30 and for yieldingly retaining the mold members in closed relation are provided. A screw 34 is mounted transversely in the bar 17 of each carriage and is formed with an annular shoulder 35 at its inner end and supplied with a gear wheel 36 at the outer end thereof. Said screw is threaded in a nut 3T removably inserted in a recess 38 formed in said carriage bar 17. A bowed spring bar 39 is slidably connected at its ends to the upper and lower portion ot the movable mold member 30 by U-shaped clips 40 secured thereto and a split block 4l. is secured at the middle of said spring bar, said block being perforated to receive the inner end of Athe screw 34 and formed with an annular shoulder 42 adapted to engage the annular tlange 35 on said screw and revolubly secure said spring and screw. The turning of the screw 34 in one direction draws the mold member 30 away from the mold member 29, thereby opening the mold, and the reverse turning ot said screw thrusts said mold member 30 in the opposite direction, thus closing the mold. The spring bar 39 forms a yielding connection between the screw and movable mold member 8O and when the inner' tace of the movable mold member 30 strikes the inner tace ot the stationary7 mold member 29, said spring bar yields to permit the further turning of the screw.

A mold opening device F is arranged at the top of the trame A between the filling end thereof and the hopper 12 to open the molds atter the metal therein has set, and a mold closing d evice G is located near the bottom ot the iframe to close the passing molds on the lower run of the track. The mold opening device F comprises a rack secured to the frame and a yielding keeper t4 above said rack. This rack is arranged in the path ot the gear wheels 3G to engage on the lower side ot' said wheels and turn the saine to open the mold as the carriages pass said rack. The keeper 44 is suspended horizontally above the rack 43 on bolts 45 slidable in supports 46 secured to the frame. Yloiled springs 4T wound around said bolts and interposed between said support-s and keeper yieldingly depress said keeper. lv'hen the gear wheels 36 reach the rack they pa beneath the keeper 44 and raise it slightly against the action of the springs 47, said keeper vieldingly retaining said gear wheels 36 in mesh with the rack but permitting the same to rise and slide over the teeth ot the rack in the event that the screws 34 will not turn. thus preventing the breakage ot parts.

rlhe mold closing device G consists ot a stationary rack 4S and a swinging rack 49.

Said racks are arranged in the path ot the gear wheels 3G, to mesh beneath and turn said wheels in a direction to close the molds. A coiledV spring 50 bears upward on the lower side ot the tree end oit the swinging rack 49 and presses the same against the gear wheels 36.

In operation, the pulley 2S is turned by power to slowly advance the mold carriages C upon the trame A. lVorkmen standing upon the platform 11 ll the passing molds D, on the upper run of the track, with molten metal. The tilled molds move a considerable distance toward the rack 4B and upon reaching it are opened by the turning ot the gear wheels 3G as they mesh with said rack. The molded product, having congealed hetore the molds are opened, falls from said molds into the hopper 12 which permits it to slide by gravity from. the machine. The mold carriages C are then partially cooled by passing through the tank E containing water. As they advance over the driving sprocket wheels 23 said mold carriages are transferred from the upper set of rails constituting the track to the lower set. The partly cooled molds D are dried by the residue of heat retained therein while slowly passing over the lower run ot' the track, after which said molds are closed as they pass the racks 4S and 49. The gear wheels 3G first engage the stationary rack 4S which is ot suflicient length to close or nearly close the molds, then pass over the upwardly pressed swinging rack 49. lVhen the spring bars are compressed considerably, thus tightly closing the molds, the gear wheels 36 are hard to turn and instead ot meshing properly with the teeth ot the swinging rack 49 they depress said rack and slide over it. Thus it will be seen that the rack 49 turns a gear 36 above it and completes the closing ot a mold it it is open, but if it is tightly closed. said rack is tilted downward, thereby umneshing the gear and rack and avoiding injury to both. ln passing around the idler sprocket wheels 21, the mold carriages are transferred from the lower set of rails to the upper set., where they are refilled. It will be noted that the spring bars 39 permit the expansion of the molds when they are filled and thereby prevent damage to the molded product.

Having described. my intention, what l claim as new and desire to protect by Letters Patent, is:

1. ln a castiiiglnachine, a iframe, an endless track on said trame, a series ot carriages adapted to travel on said track, means for moving the carriages, a separable mold on each carriage, said molds being adapted to be Vtillcd at one end ot the frame, means to open the molds at a. substantial distance trom the tilling point to discharge the contents thereot, a` tank adapted to contain water, or other cooling fluid,V said track being depressed in said tank to conduct the car'- riages therethrough and cool the then open molds, and means for thereafter closing said molds at a substantial distance from said tank.

2. In a casting-machine,a frame, an endless track on said frame, a series of carriages mounted on said track, a separable mold on each carriage comprising aV pair of mold members, a screw in each carriage connected with one mold member and supplied with a gear-wheel, racks on said frame arrangedk to engage and turn the gear-wheels to open and close the molds, and resilient means to yieldingly hold the members together when the molds are closed.

3. In a casting-machine, a frame, a mold carriage movable on said frame, av mold on said carriage comprising a plurality of separable members, mechanism on the carriage to open and close the mold in its travel, and resilient means adapted to yieldingly hold said members together when the mold is closed.

et. In a casting machine, a frame, an endless track on said frame, a series of carriages mounted on said track, a separable mold on each carriage comprising a stationary and a movable mold member, a screw in each carriage connected at its inner end to said movable mold member and supplied at its outer end with a gear wheel, and racks on said frame arranged to engage and turn said O'ear wheels, whereby the movable mold members are shifted to open and close said molds.

5. In a casting machine, a frame, an endless track on said frame, a series of carriages mounted on said track, a separable mold on each carriage comprising a stationary and movable mold member, a screw in each carriage yieldingly connected at its inner end to said movable mold member and supplied at its outer end with a gear wheel, and racks on said frame arranged to engage and turn said gear wheels, whereby the movable mold members are shifted to open and close said molds.

6. In a casting machine, a frame, an endless track on said frame, a series of carriages mounted on said track, a separable mold on each carriage comprising a. stationary and movable mold member, a` screw threaded transversely in each carriage, a bowed spring bar slidably secured at its ends upon the outer side of the movable mold member, the inner end of said screw being revolubly connected with said spring, a gear wheel on the outer end of said screw and racks on said frame arranged to engage and turn said gear wheels whereby the movable mold members are shifted to open and close said molds.

T. In a. casting machine, a frame, an endless track on said frame, a series of carriages mounted on said track, a pair of endless chains connecting said carriages, driving and idler sprocket wheels on* said frame over which'saidchains pass, a mold on each car'- riage comprising astationary and amovable mold member, a screw threaded transversely in each carriage., connected at itsinner end to said movable mold member and supplied at its ,outer endwitha gear wheel, a rackon said frame arranged to engage and turn said gear wheels whereby the movable mold members areshifted to'open said molds,"a

keeper arranged to press upon said gear wheels and yieldingly retain the same in mesh with said rack and a second rack arranged to engage and turn said gear wheelsl versel in each carriao'e connected at its inner end to said movable mold member and supplied at its outer end with a. gear wheel, arack on said frame arranged to engage and turn said gear wheels, whereby the movable mold members are'shifted to open the molds, a keeper arranged to press upon said gear wheels and yieldingly retain the same in mesh with said rack and a second rack arranged to engage and ,turn said gear wheels to close the molds, said second rack being supplied with a yielding section adapted to be depressed by said gear wheels in the event that the same fail to turn.

9. In a casting machine, a frame, a cooling tank containing water located near one end of the frame, an endless track extending from. one end of the frame to the other, said track consisting of an upper and lower set of rails overlapped at their ends, said upper set of rails passing through said tank, a series of carriages movably mounted on said track, means for driving said carriages, a mold on each carriage consisting of a stationary mold member and a movable mold member, said molds being adapted to be lled at the end of the frame opposite the tank and moved toward said tank, a hopper arranged beneath the upper set Vof rails and between the tank and filling end of the frame, means above the hopper for opening the molds to release the contents thereof into said hopper and means for closing the molds.

lO. In a casting machine, aframe, an endless track on said frame, a plurality of carriages, power driven chains connecting said carriages in an endless series, each carriage comprising a pair of side bars, a pair of shafts passing transversely through said side bars and wheels mounted on the outer ends CIK of said shafts and adapted to travel on said said gear wheels, whereby the movable mold track, a stationary mold member supported members are shifted to open and Close said between said shafts and secured thereto7 a molds.

movable mold member supported between In testimony whereof, I have signed my 5 and sldable on said shafts, a screw threaded Dame to this speoioaton n the presence of 15 transversely 1n one bar of each earrlage, sald two subsorlblng wltnesses.

screw being connected at its inner end to CHARLES HENRY LISTER. said movable mold member and supplied at Vtnesses: its outer end with a gear wheel, and racks J. E. STRYKER,

l0 on said :frame arranged to engage and turn F. C. CASWELL.

Copies of this patent may be obtained forl ve cents each, by addressing the Commissioner of PatentsL Washington, D. C. 

